- fixes handcuff overlay on monkey not showing.

- Fixes the lack of handcuff icon on the hand screen object for alien humanoids..
- fix legcuff overlay not showing on monkey.
- fixes fire overlay for monkey, aliens and cyborg, no longer looks human shaped.
- Made the regenerate_icons's subprocs at the carbon level more OOP.

code/game/objects/structures/watercloset.dm

@@ -246,7 +246,7 @@
 				M.l_hand.clean_blood()
 			if(M.back)
 				if(M.back.clean_blood())
-					M.update_inv_back(0)
+					M.update_inv_back()
 			if(ishuman(M))
 				var/mob/living/carbon/human/H = M
 				var/washgloves = 1
@@ -272,39 +272,39 @@
 
 				if(H.head)
 					if(H.head.clean_blood())
-						H.update_inv_head(0)
+						H.update_inv_head()
 				if(H.wear_suit)
 					if(H.wear_suit.clean_blood())
-						H.update_inv_wear_suit(0)
+						H.update_inv_wear_suit()
 				else if(H.w_uniform)
 					if(H.w_uniform.clean_blood())
-						H.update_inv_w_uniform(0)
+						H.update_inv_w_uniform()
 				if(H.gloves && washgloves)
 					if(H.gloves.clean_blood())
-						H.update_inv_gloves(0)
+						H.update_inv_gloves()
 				if(H.shoes && washshoes)
 					if(H.shoes.clean_blood())
-						H.update_inv_shoes(0)
+						H.update_inv_shoes()
 				if(H.wear_mask)
 					if(washmask)
 						if(H.wear_mask.clean_blood())
-							H.update_inv_wear_mask(0)
+							H.update_inv_wear_mask()
 				else
 					H.lip_style = null
 					H.update_body()
 				if(H.glasses && washglasses)
 					if(H.glasses.clean_blood())
-						H.update_inv_glasses(0)
+						H.update_inv_glasses()
 				if(H.ears && washears)
 					if(H.ears.clean_blood())
-						H.update_inv_ears(0)
+						H.update_inv_ears()
 				if(H.belt)
 					if(H.belt.clean_blood())
-						H.update_inv_belt(0)
+						H.update_inv_belt()
 			else
 				if(M.wear_mask)						//if the mob is not human, it cleans the mask without asking for bitflags
 					if(M.wear_mask.clean_blood())
-						M.update_inv_wear_mask(0)
+						M.update_inv_wear_mask()
 		else
 			O.clean_blood()